If this is your first time logging into the WHM, you may see a page titled "Feature Showcase". Click on Exit to WHM at the bottom of the page.The Feature Showcase page with "Exit to WHM" spotlighted.

Access Mail Logs

From the WHM home page, click the email icon.

The email icon.

On the email page there are several that give you information on email activity.

View Sent Summary:

The View Seny Summary icon.This tool shows the total number of message delivery attempts for each domain. This information is divided into successful and failed attempts, and shows the total number of bytes sent by each domain.

The Mail Delivery Reports icon.This tool allows you to find and review messages sent from and received by your server. You can see whether each message was delivered successfully. You can also view details about each delivery attempt.

With the information that you can access, you should be able to find out what happened to any message that went through your server.